29_27.5+_All-MTN Steel Hardtail_HR (4)

29/27.5+ Hardtail

The Weasel was born from a desire to design and fabricate mountain bikes in the Bitterroot Valley of Montana.  It adopts the modern “big wheel” geometry of a short rear end, long reach, and slack head tube angle.  The combination results in a fun, playful bike that instills confidence on the trail.

The frame is TIG welded using Paragon Machine Works components and a choice blend of butted and straight gauge 4130 steel tubing.  With the right component selection, the Weasel can be built for XC, Trail or All Mountain riding.  It is available as a frame only, rolling chassis, or complete bike.  All wheelsets are hand-built by Red Barn Bicycles. Send any questions or order inquiries to info@bitterrootcycles.com. We look forward to building your next cycle.


Classification: Modern (All-Mountain,Trail, XC, Adventure)

Wheel Size: 29, 27.5+ (2.8 Tire)

Front Fork: 120mm, 130mm, 140mm: 51mm offset

Frame Material: 4130 Chromoly Tubing

Rear Axle Spacing: Paragon Dropouts, 12mmx142mm

Headtube: Paragon internal/external relief, 44mm

Bottom Bracket: Paragon, 1.563inx73mm, threaded

Seat Post: 31.6mm  Seat Collar: 34.9mm


27.5plus 29er geometry




*All builds are subject to change due to component availability. Alternate fork travel length can be specified at the time of order.